Trimmer and gage for arc-lamps.



A. A. LOW, H. HERTZBERG & M. J. WOHL.

v TRIMMER AND GAGE FOB. AEG LAMPS.

APPLIGATION FILED DEG.24,1909.

1,01 3,409, Patented Jan.2, 1912.

f UNITED STATES PATENT, OFFICE.

A3301 A. LOW, 01 HOBSESHOE, AND HARRY HEBTZBERG AND MAURICE J. WOHL; OF I NEW YOBK, -Y.,- ASSIGNORS TO THEMSELVES, TRUSTEES.

rammna m eacn roa aacemmrsl Specification of Letters Patent.

Patented Jan. 2, 1912.

Application flled December 24, 1909. Serial No. 534,854.

To all whom it may 001mm:

Be it known that we, Armor A. Low, a resident of Horseshoe, St. Lawrence county, and: HARRY Hnn'rznnne and MAURICE 'J. lVoHL, residents of the city of New York, borough of Brooklyn, county of Kings, State of New'York, citizens of the United States, have invented certain new and use-' ful Improvements in Trimmers and Gages for Arc-.Lamps,- of which the'following is a specification. v

This invention relates to an implement for use in manipulating and replacing the carbons of arc lamps, particularly arc lamps having an upper and a lower carbon in vertical alinement. In such lamps, when the carbons are to be renewed, the remaining portions of the carbons are removed from their holding devices, a new, long carbon is inserted in the upper holding device, and the remainder of the old upper carbon, if broken off to the proper length, may be inserted in the lower holding device, to serve as a new lower carbon. It is customary to' grasp the new upper carbon in the hand while pushing it to uppermost position and seating it in its holding device; but this is not a convenient operation, inasmuch as by the time the carbon has reached the uppermost position, whence it is to feed downward as it burns away at the lower end, there is such a small amount. of the carbon projecting below the bottom plate of'the lamp, that it is diflicult to hold the carbon and properly seat it. Breaking off the old upper carbon, to make a new lower carbon, also presents some difliculty in the matter of getting the new carbon of the proper length.

The object of the present invention is to produce a tool or implement whereby the new upper carbon may be easily pushed into the lamp casing to uppermost position and seated in its holding device, and whereby the old upper carbon may be easily broken off to the exact length suitable or the new lower carbon.

Other minor objects of the invention will become apparent as the specificationv proceeds.

The accompanying drawings disclose a suitable form of tool embodying the invention, which may, however, be embodied in numerous other, apparently difi'erin forms.

Figure 1 is a vertical sectiona elevation of an arc lamp, with irrelevant parts '3 is a view showin omitted, showing the tool in the act of seating the new upper carbon; Fig. 2 is a longitudinal section through the tool, a portion of the stem thereof bein broken away for convenience in illustration; "Fig. the tool with an old upper carbon therein, preparatory to bemg broken off to make a new lower carbon;

the upper end of the tool, showing a fication thereof.

In Fig. 1 is illustrated in skeleton form an arc lamp, in which the numeral 1' indicates the casing, 2 the bottom plate, 3 vertical guiding and connecting rods, 4 the modivertical upper carbon, carried by any suitable device, as an insulating block 5 slidable on the rods 3 and provided with a split tube, or resilient or frictional holder 6, 7 a bracket depending from the plate 2 for supporting the lower carbon, and 8 a suitable Fig. 4 is a sectional view ofa portion of I holder for the lower carbon. This holder threaded opening formed through the bottom part of said bracket,-in vertical alinement with the upper holder 6. When the holder 8 is screwed upward, with a carbon therein, the carbon is tightly clamped; and when theholder 8 is screwed downward, it is allowed to spread, to release the carbon for removal; all of, which will be readily apparent. 'The parts of the lamp are not claimed herein.

The tool, in its preferred embodiment, comprises a handle 10, having a cup 1L at the outer end thereof, and anannular flange -or guard 12 at the base. of the cup, a rod or stem 13, preferably metal, mounted in the handle and projecting centrally outward from the bottom of the cup 11 to a consid erable distance beyond the rim thereof, and a measuring and holding tube 14 mounted in the handle and opening at the rear end thereof. The stem 13 is designed to be held.

in a vertical position and inserted upward through the holder '8, after removal of the lowercarbon therefrom, as illustrated in Fig. 1, for the purpose of pushing the new upper carbon into place. Better to fit it for this purpose the upper end of the stem 13 may be recessed, as indicated at 15 in Fig.

2, or the construction shown in Fig. 4 may be used. in this latter form the stem 13 is recessed as shown at 18 and a centering pin 19 inserted. lln this operation, the cup 11 receives the lower, headed end of the holder '8, enabling the rim of the cup to abut against the bottom of the bracket 7; and the rim of the cup is p..-...erably protected by a metal shell 16, forming the inner wall of the handle and projecting beyond the rear end thereof. The length of the bore of this tube is exactly the length desired for the new lower carbon hence, the old upper carbon, which is too long for the lower carbon, when placed in the tube 14, projects beyond the end thereof, and this projecting portion may be easily broken oii', as by means of pliers. The stem 13 may be secured in the forward end of the tube 14, as by a rivet orpin 17. The cup 11 plays an important part in the operation of seating the new upper carbon. The stem 13 is of such length that when the rim of the cup, that is to say, the edge of the shell 16, contacts with the under side of the bracket 7, the block 5 has engaged and is held against a suitable stop which determines the uppermost position thereof, and the carbon is fully seated in the holder 6. Were the handle of the tool to abut against the bottom of the holder 8, instead of the bracket, this exactness of positioning would be impossible, since the holder 8 being a movable tapered clamping device would at different times be in different positions due to variations in size of the carbons. Thus, either the carbon would not be sufiiciently elevated and seated, or there would be opportunity for the person manipulating the tool to break something by endeavoring to push the carbon higher than would be proper. With the construction illustrated,

in this the person using the tool is left in no unbracket, he can be assured that the cause is merely friction somewhere, as the carbon fitting rather tightly in its holder, and knows that he should continue to push the tool upward until the rim thereof contacts with the bracket.

l/Vhat is claimed as new is 1. A device for replacing carbons in an arc lamp, comprising a handle having a cup shaped portion at one end, and a rod mounted in said handle and projecting centrally outward from the bottom of said cup shaped portion to a predetermined length beyond the outer edge thereof, the outer end of said rod being recessed to receive the end of the carbon.

2. A device for replacing carbons in an arc lamp, comprising a handle having a cup shaped portion at one end, a stop positioned adjacent said cup shaped portion of said handle and projecting beyond the outer edge thereof, and a rod mounted .in said handle and projecting centrally outward from the bottom of said cup shaped portion to a predetermined length beyond said stop, the outer end of said rod being recessed to receive the end of the carbon.

3. A device for replacing carbons inan arc lamp, comprising a handle having-a cup shaped portion at one end, a cylindrical stop positioned in said cup shaped portion of said handle and projecting beyond the outer edge thereof, and a rod mounted in said handle and projecting centrally outward from the bottom of said cup shaped portion to a predetermined length beyond said stop, the outer end of said rodbeing recessed to receive the end of the carbon.

Signed at Brooklyn, N. Y, in the county of Kings and State of New York, this 26th day of November, 1909.

ABBOT A. LOW. I HARRY HERTZBERG.

MAURICE J. WOHL. Witnesses:

H. C. CZIESLEK, G. W. GIDDINGS. 

